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老年人如果出现突然急性视力下降,可能有以下原因:急性闭角性青光眼:此病多见于老年妇女,较大的精神创伤,过度的疲劳以及气候的骤变等,是此病的诱发因素。患者有剧烈的头痛、恶心,呕吐、视力锐减,并出现“虹视”(如看白炽电灯泡时,会感觉灯泡的周围有彩色的环);还会出现发热、畏寒等,容易误认为是感冒。严重者,短期内会失明。视网膜中央动脉栓塞:老年人往往由于动脉粥样硬化,动脉内壁上的粥样斑块脱落,导致视网膜中央动脉的栓塞,血液循环被阻,产生组织坏死,视细胞失去视觉功能。患者常有头痛、头昏、“雾视”(即眼前一直有雾存在的感觉)。此病多见于原有高血压病、动脉硬化及心功能不全的老年人,如不及
Acute acute angle-closure glaucoma may occur in the elderly if sudden acute vision loss occurs: the disease is more common in older women and is associated with greater trauma, excessive fatigue, and sudden changes in the climate. Patients have severe headache, nausea, vomiting, decreased sharpness, and “rainbow” (such as incandescent light bulbs, there will be colored ring around the light bulb); also appear fever, chills, etc., easy Mistaken for a cold. In severe cases, will be blind in the short term. Central retinal artery embolism: the elderly often due to atherosclerosis, arterial wall plaque off atherosclerosis, leading to embolization of the central retinal artery, blood circulation was blocked, resulting in tissue necrosis, depending on the loss of visual function cells. Patients often have headaches, dizziness, “fog as ” (that is, the presence of the fog has always felt). The disease more common in the original hypertension, arteriosclerosis and cardiac insufficiency in the elderly, if not